Insulator-clamp.



WILLIAM A. 0001:, or sHINNs'roN, EST VIRGINIA.-

INSULATOR-CLAMP.

Application filed April 9; 1913. Y Serial No. 760,061.

To all whom it mag concern p p Beit known thatI, WILLIAM A. CooK, a citizen of the United. States, residing at Shinnston, in the county of Harrison and State of West Virginia, have invented cerrain new and useful Improvements in Insulator-Clamps; and I do hereby declare the following to be a full, clear, and exact de-' scription of the invention, such as- Wlll enable others skilled in the art to 'which it appertains to make and use the same. This invention comprehends improvements in insulator clamps and relates more particularlyto those which are especially "adapted for holding telephone, telegraph, and electric wires of other descriptions upon an insulator.

The primary object of the invention is to provide a clamp of this nature, whichshall be of extremely simple construction, cheap to manufacture, and which maybe easily operated so as to permit the removal or attachment of a wire. Another and more specific object of the invention isto provide an' insulator clamp including a rigid member ezitendin through an insulator, a movable member hinged to said rigid member and extending acrossthe top of the insulator to engage -a-w1re, and means for locking said movable member to .the rigid member. w

. The invent-ion also aims to generally improve devices of this nature to render them more useful, practical, and commercially de sirable.

will become more apparent as ,tl1e' descripl tion proceeds, the invention consists in .certain novel features-of construction, combina tion, and arrangement of parts, as :will be hereinafter described and claimed.

For a complete understanding of my. invention, reference is to be had to thev fol-. lowingdescription and accompanying draw-' in'gs, in which, 1

Figure '1 is a sideelevation: of an insu 'lator and support thereofyshowing my improved clamp operatively attached to the former, Fig.2 is an edge elevation looking against the left-hand side of Fig. 1, Fig. 3 is a vertical sectional view through my improved clamp and a portion of the insulator. taken on the plane of line 33 of Fig. 2, Fig. -11: is a fragmentary view of a portion of the l'einm'ablc clamp member, showing the construction of the latch, and, Fig; 5

-' Specification of Letters Patent.

With these and other objects inview, as

Patented Mar. 17, 1914.

is .a section through the movable clamp.

member, taken on the plane of line 5'5 of Fig. l. v

1 Referring in detail to the drawing by numerals, 6 designates a preferably glass insulator, which is secured to a cross arm 7 by means of a clamping member-8. i

In the preferred embodiment of my invention, the insulator 6 is formed adjacent itsup-per end with a transversely extendingv opening to receive a fixed clamp member, generally designated 9. This member comprises a bar 10,-.having a head 11- formed upon one end thereof and-serrated'to form teeth, as indicated at 12. A pivot bar-'13 having a reduced and threaded end portion 14, whichthreadswithin an opening formed in one end of thebar 10,"completes the rigid member of the. clamp. Since this member is formed in sections as described and as clearly shown in Fig.s 3, itmay be easily positioned within the-opening extending through the insulator.

' A movable clamp" memberis'pivotally secured to the angular extension 15 of the bar l3 and comprises a yoke 16 and lever 17-.

The yoke is formed at one end to embrace .the angularextension l5..and-is securedv theretoby means of a 'pivot pin 18. The' yoke extends over the top' of the insulator and is formed with a centrally positioned jaw 19 which projects within a recess formed in the .top of said insulator. The extremity of the jaw is made ,concave and formed with teeth 21, as clearly shown in Fig. 5, .for the purpose of securely grippinga wire 22.

The leverl 'i' extends laterallyfrom the free end of the yoke and is form'ed upon its under side with a longitudinal channel 23,

for the purpose of receiving the docking means which I provide for securing the movable clamp member tothe rigid'clamp member. These locking means include a latch 24, which .is slidable within the channel 23 and which is formed with a tooth 25 for engagement with the downwardly facing teeth 12.

The latchis slidably secured in position by means of a strip 26, which is fixed at its ends tothewalls of the channel 23 and which extendsthrough a longitudinal slot 27 formed in said latch. A latch rod 28 is fixed to the outer end of the latch, extendsthrough a guide 29, and is provided with a finger extension 30. An expansive spiral spring 31 surrounds that portion of I the latch rod which lies between the latch and the guide 29 and tends to hold the-latch normally at the inner extremity of the channel 23.

From the foregoing description taken in connection with the accompanying drawing,

it will be seen that I have provided an insulator clamp which may be easily unlocked to permit a wire being attached to or removed rom an insulator and it is to be noted that the serrated head 11 makes it possible to clamp wires of various diameters. The pro- 'jection being beveled upon its under side, as clearly shown in the drawings, renders the locking of the movable member auto-- niatic, for as can be readily seen, the beveled face of the projection will cause the latch, to move outwardly against the pressure of the spring 31.

Itjis to be understood that while I'have shown and described the preferred embodiment of my invention, I do not wish to be limited to this exact constructiomcombination, and arrangement of parts, .but' may make such changes as will fall within the movable-member is carried toward the insulater; 1

3'2. li he combination with an insulator, of

aninsulator clamp comprising a fixed m'ember ,srtending through said insulator having teeth formed upon'one end thereof, a movable member pivoted to the other end of said fixed member 'and extending over the end of the insulator, and spring pressed locking means carried by the movable member for automatic engagement with the teeth upon .said fixed member when the movable menu insulator clamp including a movable member pivoted to one 'side of said insulator, said movable member comprising a yoke extending over the end of the insulator and a lever formed upon the free end of the'yoke, said lever being formed with a channel, a spring pressed latch slidable in said channel, and

means carried upon the insulator for engagement by said latch whereby the movable -member is held rigid.

5. The combination with an insulator, of

- an insulator clampcomprising a fixedmember extending transversely through said in sulator and having teeth formed upon one end thereof, a movable member pivotally attached to theother end of said fixed member comprising a yoke extending over the end of the insulator, and a lever formed upon the free end of'the yoke, a latch. slidable within a longitudinal channelformed in said lever. for engagement with the teeth, a latch rod having a' finger extension thereon, and spring means surrounding said latch rod for holding the latch normally at the extremity of its inward movement.

In testimony whereof I afiix. my signature in presence of two witnesses.

WILLIAM A. COOK.

Witnesses:

B. H. LUCAS, M. N. HALL.

09p?!" 0! this bitten-may be obtained for five centii each, by addressing the Commissioner of Patent. f a Washi'ngton,D.G. 

